Well, Aaron---- A hooded version of the Cocoon insulated pullover would be more versatile than my hoodless version. Such a garment w/ a drop tail would be my go-to garment for this or many other kinds of trips. But I may just get a Nunatak Skaha hooded down sweater as BMW is very slow to roll out new garments.
As I carry so little additional clothing, I have to be very careful about creating a pillow for sleeping---it's just adequate. I might consider either bringing a small Platypus or a small piece of blue foam (that could double as a sit pad) or even a "flex-air" inflateable pillow that I would wrap clothing around to construct a more satisfying pillow.
As I mentioned before, a more interesting menu would have helped getting the requisite calories down. A longer trip and I would have added an alcohol stove and cooking gear and had recourse to hot meals.
I'm quite happy w/ the general clothing and equipment selection that I used and just took again to another 4 day trip in the same general area. For Sierra trips with lows down to the mid-twenties, I think that for my needs, my gear list is pretty well dialled in.
I will probably continue to agonize over getting a new digital camera that will be light, offer manual controls, some WA capability and offer a sensor that will allow me to produce images of at least publication quality. This will be a future addition to my general UL gearlist and will push me over the magic 5# loaded pack weight. So be it. Besides, my list reflects the fact that I take a size L in clothing and longs in bivy and bag length. So, considering this, I don't do so badly in the weight dept.